Three-generation Climbing Car 1.9 Inch 2.2 Inch Wheel Hub Wheel Seat Metal $ 4.56 Product information : Product material: aluminum alloy Quantity: 1 Color: Black/Silver (please note the color when ordering) Weight: 4g/pcs Fits: 1/10 RC Climbing Bike SCX10 Traxxas TRX4 D90 1.9/2.2 Inch Wheels Size Information: Thread diameter: 3mm Hexagon size: 12mm Center hole diameter: 6.7mm Height: 6mm/ 9mm/ 12mm/ 15mm/ 18.4mm/ 22mm (order note) Packing list: Remote control climbing wheel hub*1